A Fort Collins streetcar on the Whedbee Loop carries a sign reading "Ice not safe today" to alert potential skaters to conditions at Sheldon Lake. This streetcar loop ran from 1919 to 1951 Courtesy Fort Collins Public Lib

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Historic Trolley Car in Fort Collins - 1980s era. Coloradoan library

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Historic Trolley Car in Fort Collins - 1980s era. Coloradoan library

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Protesters held up signs in petition of the trolley route, which was constructed in the 1980s. Coloradoan library

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Historic Trolley Car in Fort Collins - 1983. Coloradoan library

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Petition sign against the trolley route, which was constructed in the 1980s. Coloradoan library

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Trolley route construction in 1986. Coloradoan library

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Historic Trolley Car in Fort Collins - 1987. Coloradoan library

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Passengers get off the Fort Collins Trolley in Old Town Square on June 12, 1988. Coloradoan library

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Fort Collins Municipal Railway workers and other volunteers help get the trolley back on track after it derailed at the end of the line on Mountain Avenue on May 30, 1988. Passengers onboard got a slight jolt, but no one was injured. Coloradoan library

Gary Thomas, a motorman with the Fort Collins Birney Streetcar pulls on the rope connected to one of the trollys before taking off from City Park Saurday June 9, 2001. V. Richard Haro / The Coloradoan

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The Fort Collins Birney Streetcar makes its way westbound on Mountain Ave. Saturday June 9, 2001, as traffic catches up to it V. Richard Haro / The Coloradoan

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Gil Moon, motorman on Birney Car 21, navigates a turn while driving passengers onto Mountain Avenue in 2003 during the first day of the 1919 streetcar's 19th season of operation following its restoration. The car ran as part of Fort Collins transportation system from May, 1919 until the end of June, 1951. Coloradoan library

Fort Collins Municipal Railway's Society's Birney Car 21 and a 1925 Model T Ford share the roadway along West Mountain Avenue Sunday June 3, 2007. The trolley line began in Fort Collins in 1908 and ran until 1951. Geary (cq) Baese (cq), the owner and driver of the Model T, lives on Mountain Avenue along the trolley's 3.5 mile loop. Rich Abrahamson LCL:STF

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Volunteers from left Charlie Rock, Roger Mitchell and Brad March push Fort Collins Municipal Railway Birney Streetcar No. 21 back into its barn after the men worked on the historic trolley Sunday April 10, 2011. Rich Abrahamson / The Coloradoan

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Volunteer Brad March hops off Fort Collins Municipal Railway Birney Streetcar No. 21 on April 10, 2011. Roger Mitchell, who is the chief mechanical officer and director, said that both axles and a spring were replaced on the trolley. Rich Abrahamson / The Coloradoan